Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 1 | /* A Media Gateway Control Protocol Media Gateway: RFC 3435 */ |
| 2 | /* The protocol implementation */ |
| 3 | |
| 4 | /* |
Holger Hans Peter Freyther | 38e02c5 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 5 | * (C) 2009-2012 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 6 | * (C) 2009-2012 by On-Waves |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 10 | * it under the terms of the GNU Affero General Public License as published by |
| 11 | * the Free Software Foundation; either version 3 of the License, or |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * GNU Affero General Public License for more details. |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 18 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 19 | * You should have received a copy of the GNU Affero General Public License |
| 20 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <string.h> |
Holger Hans Peter Freyther | b715d7f | 2010-05-14 02:14:09 +0800 | [diff] [blame] | 25 | #include <stdlib.h> |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 26 | #include <unistd.h> |
Holger Hans Peter Freyther | 575b895 | 2010-04-07 12:55:40 +0200 | [diff] [blame] | 27 | #include <errno.h> |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 28 | |
| 29 | #include <sys/socket.h> |
| 30 | #include <arpa/inet.h> |
| 31 | |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 32 | #include <osmocom/core/msgb.h> |
| 33 | #include <osmocom/core/select.h> |
Holger Hans Peter Freyther | 1ebad74 | 2010-02-26 20:16:37 +0100 | [diff] [blame] | 34 | |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 35 | #include <openbsc/mgcp.h> |
| 36 | #include <openbsc/mgcp_internal.h> |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 37 | |
| 38 | #warning "Make use of the rtp proxy code" |
| 39 | |
Holger Hans Peter Freyther | 3cb2879 | 2010-10-12 15:39:46 +0200 | [diff] [blame] | 40 | /* attempt to determine byte order */ |
Holger Hans Peter Freyther | 3cb2879 | 2010-10-12 15:39:46 +0200 | [diff] [blame] | 41 | #include <sys/param.h> |
| 42 | #include <limits.h> |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 43 | #include <time.h> |
Holger Hans Peter Freyther | 3cb2879 | 2010-10-12 15:39:46 +0200 | [diff] [blame] | 44 | |
| 45 | #ifndef __BYTE_ORDER |
Tobias Engel | aff2071 | 2012-10-24 17:53:50 +0200 | [diff] [blame] | 46 | # ifdef __APPLE__ |
| 47 | # define __BYTE_ORDER __DARWIN_BYTE_ORDER |
| 48 | # define __LITTLE_ENDIAN __DARWIN_LITTLE_ENDIAN |
| 49 | # define __BIG_ENDIAN __DARWIN_BIG_ENDIAN |
| 50 | # else |
| 51 | # error "__BYTE_ORDER should be defined by someone" |
| 52 | # endif |
Holger Hans Peter Freyther | 3cb2879 | 2010-10-12 15:39:46 +0200 | [diff] [blame] | 53 | #endif |
| 54 | |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 55 | /* according to rtp_proxy.c RFC 3550 */ |
| 56 | struct rtp_hdr { |
| 57 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
Holger Hans Peter Freyther | 7dece86 | 2010-07-23 18:56:26 +0800 | [diff] [blame] | 58 | uint8_t csrc_count:4, |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 59 | extension:1, |
| 60 | padding:1, |
| 61 | version:2; |
Holger Hans Peter Freyther | 7dece86 | 2010-07-23 18:56:26 +0800 | [diff] [blame] | 62 | uint8_t payload_type:7, |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 63 | marker:1; |
| 64 | #elif __BYTE_ORDER == __BIG_ENDIAN |
Holger Hans Peter Freyther | 7dece86 | 2010-07-23 18:56:26 +0800 | [diff] [blame] | 65 | uint8_t version:2, |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 66 | padding:1, |
| 67 | extension:1, |
| 68 | csrc_count:4; |
Holger Hans Peter Freyther | 7dece86 | 2010-07-23 18:56:26 +0800 | [diff] [blame] | 69 | uint8_t marker:1, |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 70 | payload_type:7; |
| 71 | #endif |
Holger Hans Peter Freyther | d340cd3 | 2010-07-23 18:56:01 +0800 | [diff] [blame] | 72 | uint16_t sequence; |
Holger Hans Peter Freyther | d9b18f8 | 2010-07-23 18:55:38 +0800 | [diff] [blame] | 73 | uint32_t timestamp; |
| 74 | uint32_t ssrc; |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 75 | } __attribute__((packed)); |
| 76 | |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 77 | #define RTP_SEQ_MOD (1 << 16) |
| 78 | #define RTP_MAX_DROPOUT 3000 |
| 79 | #define RTP_MAX_MISORDER 100 |
| 80 | |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 81 | |
| 82 | enum { |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 83 | MGCP_DEST_NET = 0, |
| 84 | MGCP_DEST_BTS, |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 85 | }; |
| 86 | |
| 87 | enum { |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 88 | MGCP_PROTO_RTP, |
| 89 | MGCP_PROTO_RTCP, |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 90 | }; |
| 91 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 92 | #define MGCP_DUMMY_LOAD 0x23 |
Holger Hans Peter Freyther | b844b87 | 2010-04-21 21:25:13 +0800 | [diff] [blame] | 93 | |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 94 | |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 95 | /** |
| 96 | * This does not need to be a precision timestamp and |
| 97 | * is allowed to wrap quite fast. The returned value is |
| 98 | * milli seconds now. |
| 99 | */ |
| 100 | uint32_t get_current_ts(void) |
| 101 | { |
| 102 | struct timespec tp; |
| 103 | uint64_t ret; |
| 104 | |
| 105 | memset(&tp, 0, sizeof(tp)); |
| 106 | if (clock_gettime(CLOCK_MONOTONIC, &tp) != 0) |
| 107 | LOGP(DMGCP, LOGL_NOTICE, |
| 108 | "Getting the clock failed.\n"); |
| 109 | |
| 110 | /* convert it to useconds */ |
| 111 | ret = tp.tv_sec; |
| 112 | ret *= 1000; |
| 113 | ret += tp.tv_nsec / 1000 / 1000; |
| 114 | |
| 115 | return ret; |
| 116 | } |
| 117 | |
Pablo Neira Ayuso | d81fec0 | 2013-08-25 17:39:38 +0200 | [diff] [blame] | 118 | static int mgcp_udp_send(int fd, struct in_addr *addr, int port, char *buf, |
| 119 | int len) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 120 | { |
| 121 | struct sockaddr_in out; |
| 122 | out.sin_family = AF_INET; |
| 123 | out.sin_port = port; |
| 124 | memcpy(&out.sin_addr, addr, sizeof(*addr)); |
| 125 | |
| 126 | return sendto(fd, buf, len, 0, (struct sockaddr *)&out, sizeof(out)); |
| 127 | } |
| 128 | |
Holger Hans Peter Freyther | b844b87 | 2010-04-21 21:25:13 +0800 | [diff] [blame] | 129 | int mgcp_send_dummy(struct mgcp_endpoint *endp) |
| 130 | { |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 131 | static char buf[] = { MGCP_DUMMY_LOAD }; |
Holger Hans Peter Freyther | b844b87 | 2010-04-21 21:25:13 +0800 | [diff] [blame] | 132 | |
Pablo Neira Ayuso | d81fec0 | 2013-08-25 17:39:38 +0200 | [diff] [blame] | 133 | return mgcp_udp_send(endp->net_end.rtp.fd, &endp->net_end.addr, |
| 134 | endp->net_end.rtp_port, buf, 1); |
Holger Hans Peter Freyther | b844b87 | 2010-04-21 21:25:13 +0800 | [diff] [blame] | 135 | } |
| 136 | |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame^] | 137 | static int32_t compute_timestamp_aligment_error(struct mgcp_rtp_stream_state *sstate, |
| 138 | int ptime, uint32_t timestamp) |
| 139 | { |
| 140 | int32_t timestamp_delta; |
| 141 | |
| 142 | if (ptime == 0) |
| 143 | return 0; |
| 144 | |
| 145 | /* Align according to: T - Tlast = k * Tptime */ |
| 146 | timestamp_delta = timestamp - sstate->last_timestamp; |
| 147 | |
| 148 | return timestamp_delta % ptime; |
| 149 | } |
| 150 | |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 151 | static int check_rtp_timestamp(struct mgcp_endpoint *endp, |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame^] | 152 | struct mgcp_rtp_state *state, |
| 153 | struct mgcp_rtp_stream_state *sstate, |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 154 | struct mgcp_rtp_end *rtp_end, |
| 155 | struct sockaddr_in *addr, |
| 156 | uint16_t seq, uint32_t timestamp, |
| 157 | const char *text, int32_t *tsdelta_out) |
| 158 | { |
| 159 | int32_t tsdelta; |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame^] | 160 | int32_t timestamp_error; |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 161 | |
| 162 | /* Not fully intialized, skip */ |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame^] | 163 | if (sstate->last_tsdelta == 0 && timestamp == sstate->last_timestamp) |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 164 | return 0; |
| 165 | |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame^] | 166 | if (seq == sstate->last_seq) { |
| 167 | if (timestamp != sstate->last_timestamp) { |
| 168 | sstate->err_ts_counter += 1; |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 169 | LOGP(DMGCP, LOGL_ERROR, |
| 170 | "The %s timestamp delta is != 0 but the sequence " |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame^] | 171 | "number %d is the same, " |
| 172 | "TS offset: %d, SeqNo offset: %d " |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 173 | "on 0x%x SSRC: %u timestamp: %u " |
| 174 | "from %s:%d in %d\n", |
| 175 | text, seq, |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame^] | 176 | state->timestamp_offset, state->seq_offset, |
| 177 | ENDPOINT_NUMBER(endp), sstate->ssrc, timestamp, |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 178 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 179 | endp->conn_mode); |
| 180 | } |
| 181 | return 0; |
| 182 | } |
| 183 | |
| 184 | tsdelta = |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame^] | 185 | (int32_t)(timestamp - sstate->last_timestamp) / |
| 186 | (int16_t)(seq - sstate->last_seq); |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 187 | |
| 188 | if (tsdelta == 0) { |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame^] | 189 | /* Don't update *tsdelta_out */ |
| 190 | LOGP(DMGCP, LOGL_NOTICE, |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 191 | "The %s timestamp delta is %d " |
| 192 | "on 0x%x SSRC: %u timestamp: %u " |
| 193 | "from %s:%d in %d\n", |
| 194 | text, tsdelta, |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame^] | 195 | ENDPOINT_NUMBER(endp), sstate->ssrc, timestamp, |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 196 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 197 | endp->conn_mode); |
| 198 | |
| 199 | return 0; |
| 200 | } |
| 201 | |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame^] | 202 | if (sstate->last_tsdelta != tsdelta) { |
| 203 | if (sstate->last_tsdelta) { |
| 204 | LOGP(DMGCP, LOGL_INFO, |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 205 | "The %s timestamp delta changes from %d to %d " |
| 206 | "on 0x%x SSRC: %u timestamp: %u from %s:%d in %d\n", |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame^] | 207 | text, sstate->last_tsdelta, tsdelta, |
| 208 | ENDPOINT_NUMBER(endp), sstate->ssrc, timestamp, |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 209 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 210 | endp->conn_mode); |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | if (tsdelta_out) |
| 215 | *tsdelta_out = tsdelta; |
| 216 | |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame^] | 217 | timestamp_error = |
| 218 | compute_timestamp_aligment_error(sstate, state->packet_duration, |
| 219 | timestamp); |
| 220 | |
| 221 | if (timestamp_error) { |
| 222 | sstate->err_ts_counter += 1; |
| 223 | LOGP(DMGCP, LOGL_NOTICE, |
| 224 | "The %s timestamp has an alignment error of %d " |
| 225 | "on 0x%x SSRC: %u " |
| 226 | "SeqNo delta: %d, TS delta: %d, dTS/dSeq: %d " |
| 227 | "from %s:%d in %d\n", |
| 228 | text, timestamp_error, |
| 229 | ENDPOINT_NUMBER(endp), sstate->ssrc, |
| 230 | (int16_t)(seq - sstate->last_seq), |
| 231 | (int32_t)(timestamp - sstate->last_timestamp), |
| 232 | tsdelta, |
| 233 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 234 | endp->conn_mode); |
| 235 | } |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 236 | return 1; |
| 237 | } |
| 238 | |
Jacob Erlbeck | 33f3009 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 239 | /* Set the timestamp offset according to the packet duration. */ |
| 240 | static int adjust_rtp_timestamp_offset(struct mgcp_endpoint *endp, |
| 241 | struct mgcp_rtp_state *state, |
| 242 | struct mgcp_rtp_end *rtp_end, |
| 243 | struct sockaddr_in *addr, |
| 244 | int16_t delta_seq, uint32_t timestamp) |
| 245 | { |
| 246 | int32_t tsdelta = state->packet_duration; |
| 247 | int timestamp_offset; |
| 248 | |
| 249 | if (tsdelta == 0) { |
| 250 | tsdelta = state->out_stream.last_tsdelta; |
| 251 | if (tsdelta != 0) { |
| 252 | LOGP(DMGCP, LOGL_NOTICE, |
| 253 | "A fixed packet duration is not available on 0x%x, " |
| 254 | "using last output timestamp delta instead: %d " |
| 255 | "from %s:%d in %d\n", |
| 256 | ENDPOINT_NUMBER(endp), tsdelta, |
| 257 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 258 | endp->conn_mode); |
| 259 | } else { |
| 260 | tsdelta = rtp_end->rate * 20 / 1000; |
| 261 | LOGP(DMGCP, LOGL_NOTICE, |
| 262 | "Fixed packet duration and last timestamp delta " |
| 263 | "are not available on 0x%x, " |
| 264 | "using fixed 20ms instead: %d " |
| 265 | "from %s:%d in %d\n", |
| 266 | ENDPOINT_NUMBER(endp), tsdelta, |
| 267 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 268 | endp->conn_mode); |
| 269 | } |
| 270 | } |
| 271 | |
| 272 | timestamp_offset = |
| 273 | state->out_stream.last_timestamp - timestamp + |
| 274 | delta_seq * tsdelta; |
| 275 | |
| 276 | if (state->timestamp_offset != timestamp_offset) { |
| 277 | state->timestamp_offset = timestamp_offset; |
| 278 | |
| 279 | LOGP(DMGCP, LOGL_NOTICE, |
| 280 | "Timestamp offset change on 0x%x SSRC: %u " |
| 281 | "SeqNo delta: %d, TS offset: %d, " |
| 282 | "from %s:%d in %d\n", |
| 283 | ENDPOINT_NUMBER(endp), state->in_stream.ssrc, |
| 284 | delta_seq, state->timestamp_offset, |
| 285 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 286 | endp->conn_mode); |
| 287 | } |
| 288 | |
| 289 | return timestamp_offset; |
| 290 | } |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 291 | |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame^] | 292 | /* Set the timestamp offset according to the packet duration. */ |
| 293 | static int align_rtp_timestamp_offset(struct mgcp_endpoint *endp, |
| 294 | struct mgcp_rtp_state *state, |
| 295 | struct mgcp_rtp_end *rtp_end, |
| 296 | struct sockaddr_in *addr, |
| 297 | uint32_t timestamp) |
| 298 | { |
| 299 | int timestamp_error = 0; |
| 300 | int ptime = state->packet_duration; |
| 301 | |
| 302 | /* Align according to: T + Toffs - Tlast = k * Tptime */ |
| 303 | |
| 304 | timestamp_error = compute_timestamp_aligment_error( |
| 305 | &state->out_stream, ptime, |
| 306 | timestamp + state->timestamp_offset); |
| 307 | |
| 308 | if (timestamp_error) { |
| 309 | state->timestamp_offset += ptime - timestamp_error; |
| 310 | |
| 311 | LOGP(DMGCP, LOGL_NOTICE, |
| 312 | "Corrected timestamp alignment error of %d on 0x%x SSRC: %u " |
| 313 | "new TS offset: %d, " |
| 314 | "from %s:%d in %d\n", |
| 315 | timestamp_error, |
| 316 | ENDPOINT_NUMBER(endp), state->in_stream.ssrc, |
| 317 | state->timestamp_offset, inet_ntoa(addr->sin_addr), |
| 318 | ntohs(addr->sin_port), endp->conn_mode); |
| 319 | } |
| 320 | |
| 321 | OSMO_ASSERT(compute_timestamp_aligment_error(&state->out_stream, ptime, |
| 322 | timestamp + state->timestamp_offset) == 0); |
| 323 | |
| 324 | return timestamp_error; |
| 325 | } |
| 326 | |
| 327 | |
Holger Hans Peter Freyther | 1e85af6 | 2012-10-22 17:15:31 +0200 | [diff] [blame] | 328 | /** |
| 329 | * The RFC 3550 Appendix A assumes there are multiple sources but |
| 330 | * some of the supported endpoints (e.g. the nanoBTS) can only handle |
| 331 | * one source and this code will patch packages to appear as if there |
| 332 | * is only one source. |
| 333 | * There is also no probation period for new sources. Every package |
| 334 | * we receive will be seen as a switch in streams. |
| 335 | */ |
Jacob Erlbeck | d62419b | 2013-11-25 12:53:29 +0100 | [diff] [blame] | 336 | void mgcp_patch_and_count(struct mgcp_endpoint *endp, struct mgcp_rtp_state *state, |
| 337 | struct mgcp_rtp_end *rtp_end, struct sockaddr_in *addr, |
| 338 | char *data, int len) |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 339 | { |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 340 | uint32_t arrival_time; |
| 341 | int32_t transit, d; |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 342 | uint16_t seq, udelta; |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 343 | uint32_t timestamp, ssrc; |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 344 | struct rtp_hdr *rtp_hdr; |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 345 | int payload = rtp_end->payload_type; |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 346 | |
| 347 | if (len < sizeof(*rtp_hdr)) |
| 348 | return; |
| 349 | |
Holger Hans Peter Freyther | 380b871 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 350 | rtp_hdr = (struct rtp_hdr *) data; |
| 351 | seq = ntohs(rtp_hdr->sequence); |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 352 | timestamp = ntohl(rtp_hdr->timestamp); |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 353 | arrival_time = get_current_ts(); |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 354 | ssrc = ntohl(rtp_hdr->ssrc); |
Holger Hans Peter Freyther | 380b871 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 355 | |
Holger Hans Peter Freyther | 3186892 | 2010-08-03 11:59:04 +0000 | [diff] [blame] | 356 | if (!state->initialized) { |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 357 | state->in_stream.last_seq = seq - 1; |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 358 | state->in_stream.ssrc = state->orig_ssrc = ssrc; |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 359 | state->in_stream.last_tsdelta = 0; |
Holger Hans Peter Freyther | ed3a661 | 2012-10-22 17:08:48 +0200 | [diff] [blame] | 360 | state->base_seq = seq; |
Holger Hans Peter Freyther | 3186892 | 2010-08-03 11:59:04 +0000 | [diff] [blame] | 361 | state->initialized = 1; |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 362 | state->jitter = 0; |
| 363 | state->transit = arrival_time - timestamp; |
Jacob Erlbeck | f6ec0e9 | 2013-12-04 10:30:11 +0100 | [diff] [blame] | 364 | state->packet_duration = mgcp_rtp_packet_duration(endp, rtp_end); |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 365 | state->out_stream = state->in_stream; |
Jacob Erlbeck | 55ba140 | 2013-11-29 11:16:07 +0100 | [diff] [blame] | 366 | state->out_stream.last_timestamp = timestamp; |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 367 | state->out_stream.ssrc = ssrc - 1; /* force output SSRC change */ |
Jacob Erlbeck | 55ba140 | 2013-11-29 11:16:07 +0100 | [diff] [blame] | 368 | LOGP(DMGCP, LOGL_INFO, |
| 369 | "Initializing stream on 0x%x SSRC: %u timestamp: %u " |
Jacob Erlbeck | 30ce422 | 2013-12-05 12:02:15 +0100 | [diff] [blame] | 370 | "pkt-duration: %d, from %s:%d in %d\n", |
Jacob Erlbeck | 55ba140 | 2013-11-29 11:16:07 +0100 | [diff] [blame] | 371 | ENDPOINT_NUMBER(endp), state->in_stream.ssrc, |
Jacob Erlbeck | 30ce422 | 2013-12-05 12:02:15 +0100 | [diff] [blame] | 372 | state->seq_offset, state->packet_duration, |
Jacob Erlbeck | 55ba140 | 2013-11-29 11:16:07 +0100 | [diff] [blame] | 373 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 374 | endp->conn_mode); |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame^] | 375 | if (state->packet_duration == 0) { |
| 376 | state->packet_duration = rtp_end->rate * 20 / 1000; |
| 377 | LOGP(DMGCP, LOGL_NOTICE, |
| 378 | "Fixed packet duration is not available on 0x%x, " |
| 379 | "using fixed 20ms instead: %d from %s:%d in %d\n", |
| 380 | ENDPOINT_NUMBER(endp), state->packet_duration, |
| 381 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 382 | endp->conn_mode); |
| 383 | } |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 384 | } else if (state->in_stream.ssrc != ssrc) { |
Jacob Erlbeck | 5e9549e | 2013-12-05 12:20:05 +0100 | [diff] [blame] | 385 | LOGP(DMGCP, LOGL_NOTICE, |
| 386 | "The SSRC changed on 0x%x: %u -> %u " |
| 387 | "from %s:%d in %d\n", |
| 388 | ENDPOINT_NUMBER(endp), |
| 389 | state->in_stream.ssrc, rtp_hdr->ssrc, |
| 390 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 391 | endp->conn_mode); |
| 392 | |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 393 | state->in_stream.ssrc = ssrc; |
Jacob Erlbeck | b35a777 | 2013-12-05 11:33:20 +0100 | [diff] [blame] | 394 | if (rtp_end->force_constant_ssrc) { |
Jacob Erlbeck | 33f3009 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 395 | const int16_t delta_seq = 1; |
| 396 | |
Jacob Erlbeck | b35a777 | 2013-12-05 11:33:20 +0100 | [diff] [blame] | 397 | state->seq_offset = |
Jacob Erlbeck | 33f3009 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 398 | (state->out_stream.last_seq + delta_seq) - seq; |
| 399 | |
| 400 | adjust_rtp_timestamp_offset(endp, state, rtp_end, addr, |
| 401 | delta_seq, timestamp); |
| 402 | |
Jacob Erlbeck | 58340e5 | 2013-11-29 11:20:06 +0100 | [diff] [blame] | 403 | state->patch_ssrc = 1; |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 404 | ssrc = state->orig_ssrc; |
Jacob Erlbeck | e2292f3 | 2013-12-03 15:13:12 +0100 | [diff] [blame] | 405 | if (rtp_end->force_constant_ssrc != -1) |
| 406 | rtp_end->force_constant_ssrc -= 1; |
Jacob Erlbeck | b35a777 | 2013-12-05 11:33:20 +0100 | [diff] [blame] | 407 | |
| 408 | LOGP(DMGCP, LOGL_NOTICE, |
| 409 | "SSRC patching enabled on 0x%x SSRC: %u " |
Jacob Erlbeck | 33f3009 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 410 | "SeqNo offset: %d, TS offset: %d " |
Jacob Erlbeck | b35a777 | 2013-12-05 11:33:20 +0100 | [diff] [blame] | 411 | "from %s:%d in %d\n", |
| 412 | ENDPOINT_NUMBER(endp), state->in_stream.ssrc, |
Jacob Erlbeck | 33f3009 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 413 | state->seq_offset, state->timestamp_offset, |
Jacob Erlbeck | b35a777 | 2013-12-05 11:33:20 +0100 | [diff] [blame] | 414 | inet_ntoa(addr->sin_addr), ntohs(addr->sin_port), |
| 415 | endp->conn_mode); |
| 416 | } |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 417 | |
| 418 | state->in_stream.last_tsdelta = 0; |
| 419 | } else { |
| 420 | /* Compute current per-packet timestamp delta */ |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame^] | 421 | check_rtp_timestamp(endp, state, &state->in_stream, rtp_end, addr, |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 422 | seq, timestamp, "input", |
| 423 | &state->in_stream.last_tsdelta); |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 424 | |
Jacob Erlbeck | 58340e5 | 2013-11-29 11:20:06 +0100 | [diff] [blame] | 425 | if (state->patch_ssrc) |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 426 | ssrc = state->orig_ssrc; |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 427 | } |
Holger Hans Peter Freyther | 380b871 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 428 | |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 429 | /* Save before patching */ |
| 430 | state->in_stream.last_timestamp = timestamp; |
| 431 | state->in_stream.last_seq = seq; |
| 432 | |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame^] | 433 | if (rtp_end->force_aligned_timing && |
| 434 | state->out_stream.ssrc == ssrc && state->packet_duration) |
| 435 | /* Align the timestamp offset */ |
| 436 | align_rtp_timestamp_offset(endp, state, rtp_end, addr, timestamp); |
Jacob Erlbeck | 58340e5 | 2013-11-29 11:20:06 +0100 | [diff] [blame] | 437 | |
| 438 | /* Store the updated SSRC back to the packet */ |
| 439 | if (state->patch_ssrc) |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 440 | rtp_hdr->ssrc = htonl(ssrc); |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 441 | |
Jacob Erlbeck | 58340e5 | 2013-11-29 11:20:06 +0100 | [diff] [blame] | 442 | /* Apply the offset and store it back to the packet. |
| 443 | * This won't change anything if the offset is 0, so the conditional is |
| 444 | * omitted. */ |
| 445 | seq += state->seq_offset; |
| 446 | rtp_hdr->sequence = htons(seq); |
| 447 | timestamp += state->timestamp_offset; |
| 448 | rtp_hdr->timestamp = htonl(timestamp); |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 449 | |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 450 | /* Check again, whether the timestamps are still valid */ |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 451 | if (state->out_stream.ssrc == ssrc) |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame^] | 452 | check_rtp_timestamp(endp, state, &state->out_stream, rtp_end, |
| 453 | addr, seq, timestamp, "output", |
Jacob Erlbeck | 55ba140 | 2013-11-29 11:16:07 +0100 | [diff] [blame] | 454 | &state->out_stream.last_tsdelta); |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 455 | |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 456 | /* |
| 457 | * The below takes the shape of the validation from Appendix A. Check |
| 458 | * if there is something weird with the sequence number, otherwise check |
| 459 | * for a wrap around in the sequence number. |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 460 | * |
| 461 | * Note that last_seq is used where the appendix mentions max_seq. |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 462 | */ |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 463 | udelta = seq - state->out_stream.last_seq; |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 464 | if (udelta < RTP_MAX_DROPOUT) { |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 465 | if (seq < state->out_stream.last_seq) |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 466 | state->cycles += RTP_SEQ_MOD; |
Holger Hans Peter Freyther | 7e7ee5f | 2012-12-16 13:07:45 +0100 | [diff] [blame] | 467 | } else if (udelta <= RTP_SEQ_MOD - RTP_MAX_MISORDER) { |
Holger Hans Peter Freyther | 769912c | 2012-10-22 17:30:12 +0200 | [diff] [blame] | 468 | LOGP(DMGCP, LOGL_NOTICE, |
| 469 | "RTP seqno made a very large jump on 0x%x delta: %u\n", |
| 470 | ENDPOINT_NUMBER(endp), udelta); |
| 471 | } |
| 472 | |
Holger Hans Peter Freyther | 30690ad | 2012-10-24 20:31:25 +0200 | [diff] [blame] | 473 | /* |
| 474 | * calculate the jitter between the two packages. The TS should be |
| 475 | * taken closer to the read function. This was taken from the |
| 476 | * Appendix A of RFC 3550. The local timestamp has a usec resolution. |
| 477 | */ |
| 478 | transit = arrival_time - timestamp; |
| 479 | d = transit - state->transit; |
| 480 | state->transit = transit; |
| 481 | if (d < 0) |
| 482 | d = -d; |
| 483 | state->jitter += d - ((state->jitter + 8) >> 4); |
| 484 | |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 485 | /* Save output values */ |
| 486 | state->out_stream.last_seq = seq; |
| 487 | state->out_stream.last_timestamp = timestamp; |
Jacob Erlbeck | 3da9e4e | 2013-12-03 15:47:04 +0100 | [diff] [blame] | 488 | state->out_stream.ssrc = ssrc; |
Holger Hans Peter Freyther | 6aa882b | 2010-08-03 14:35:50 +0000 | [diff] [blame] | 489 | |
Holger Hans Peter Freyther | 7279d24 | 2010-04-06 11:15:50 +0200 | [diff] [blame] | 490 | if (payload < 0) |
| 491 | return; |
| 492 | |
Holger Hans Peter Freyther | 36ed8cc | 2010-02-26 13:42:58 +0100 | [diff] [blame] | 493 | rtp_hdr->payload_type = payload; |
| 494 | } |
| 495 | |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 496 | /* |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 497 | * The below code is for dispatching. We have a dedicated port for |
| 498 | * the data coming from the net and one to discover the BTS. |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 499 | */ |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 500 | static int forward_data(int fd, struct mgcp_rtp_tap *tap, const char *buf, int len) |
| 501 | { |
| 502 | if (!tap->enabled) |
| 503 | return 0; |
| 504 | |
| 505 | return sendto(fd, buf, len, 0, |
| 506 | (struct sockaddr *)&tap->forward, sizeof(tap->forward)); |
| 507 | } |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 508 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 509 | static int mgcp_send_transcoder(struct mgcp_rtp_end *end, |
| 510 | struct mgcp_config *cfg, int is_rtp, |
| 511 | const char *buf, int len) |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 512 | { |
| 513 | int rc; |
| 514 | int port; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 515 | struct sockaddr_in addr; |
| 516 | |
Holger Hans Peter Freyther | 8b19dee | 2010-11-01 22:38:25 +0100 | [diff] [blame] | 517 | port = is_rtp ? end->rtp_port : end->rtcp_port; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 518 | |
| 519 | addr.sin_family = AF_INET; |
| 520 | addr.sin_addr = cfg->transcoder_in; |
Holger Hans Peter Freyther | 5f2cd84 | 2010-11-01 21:53:39 +0100 | [diff] [blame] | 521 | addr.sin_port = port; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 522 | |
| 523 | rc = sendto(is_rtp ? |
Holger Hans Peter Freyther | 8b19dee | 2010-11-01 22:38:25 +0100 | [diff] [blame] | 524 | end->rtp.fd : |
| 525 | end->rtcp.fd, buf, len, 0, |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 526 | (struct sockaddr *) &addr, sizeof(addr)); |
| 527 | |
| 528 | if (rc != len) |
| 529 | LOGP(DMGCP, LOGL_ERROR, |
| 530 | "Failed to send data to the transcoder: %s\n", |
| 531 | strerror(errno)); |
| 532 | |
| 533 | return rc; |
| 534 | } |
| 535 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 536 | static int mgcp_send(struct mgcp_endpoint *endp, int dest, int is_rtp, |
| 537 | struct sockaddr_in *addr, char *buf, int rc) |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 538 | { |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 539 | struct mgcp_trunk_config *tcfg = endp->tcfg; |
Holger Hans Peter Freyther | 1fc4329 | 2010-08-05 06:31:58 +0800 | [diff] [blame] | 540 | /* For loop toggle the destination and then dispatch. */ |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 541 | if (tcfg->audio_loop) |
Holger Hans Peter Freyther | 1fc4329 | 2010-08-05 06:31:58 +0800 | [diff] [blame] | 542 | dest = !dest; |
| 543 | |
| 544 | /* Loop based on the conn_mode, maybe undoing the above */ |
| 545 | if (endp->conn_mode == MGCP_CONN_LOOPBACK) |
| 546 | dest = !dest; |
| 547 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 548 | if (dest == MGCP_DEST_NET) { |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 549 | if (is_rtp) { |
Jacob Erlbeck | d62419b | 2013-11-25 12:53:29 +0100 | [diff] [blame] | 550 | mgcp_patch_and_count(endp, &endp->bts_state, |
| 551 | &endp->net_end, |
| 552 | addr, buf, rc); |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 553 | forward_data(endp->net_end.rtp.fd, |
| 554 | &endp->taps[MGCP_TAP_NET_OUT], buf, rc); |
Pablo Neira Ayuso | d81fec0 | 2013-08-25 17:39:38 +0200 | [diff] [blame] | 555 | return mgcp_udp_send(endp->net_end.rtp.fd, |
| 556 | &endp->net_end.addr, |
| 557 | endp->net_end.rtp_port, buf, rc); |
Holger Hans Peter Freyther | a8090d5 | 2012-05-11 13:00:45 +0200 | [diff] [blame] | 558 | } else if (!tcfg->omit_rtcp) { |
Pablo Neira Ayuso | d81fec0 | 2013-08-25 17:39:38 +0200 | [diff] [blame] | 559 | return mgcp_udp_send(endp->net_end.rtcp.fd, |
| 560 | &endp->net_end.addr, |
| 561 | endp->net_end.rtcp_port, buf, rc); |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 562 | } |
| 563 | } else { |
| 564 | if (is_rtp) { |
Jacob Erlbeck | d62419b | 2013-11-25 12:53:29 +0100 | [diff] [blame] | 565 | mgcp_patch_and_count(endp, &endp->net_state, |
| 566 | &endp->bts_end, |
| 567 | addr, buf, rc); |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 568 | forward_data(endp->bts_end.rtp.fd, |
| 569 | &endp->taps[MGCP_TAP_BTS_OUT], buf, rc); |
Pablo Neira Ayuso | d81fec0 | 2013-08-25 17:39:38 +0200 | [diff] [blame] | 570 | return mgcp_udp_send(endp->bts_end.rtp.fd, |
| 571 | &endp->bts_end.addr, |
| 572 | endp->bts_end.rtp_port, buf, rc); |
Holger Hans Peter Freyther | a8090d5 | 2012-05-11 13:00:45 +0200 | [diff] [blame] | 573 | } else if (!tcfg->omit_rtcp) { |
Pablo Neira Ayuso | d81fec0 | 2013-08-25 17:39:38 +0200 | [diff] [blame] | 574 | return mgcp_udp_send(endp->bts_end.rtcp.fd, |
| 575 | &endp->bts_end.addr, |
| 576 | endp->bts_end.rtcp_port, buf, rc); |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 577 | } |
| 578 | } |
Holger Hans Peter Freyther | 8c3d069 | 2012-09-11 12:31:25 +0200 | [diff] [blame] | 579 | |
| 580 | return 0; |
Holger Hans Peter Freyther | 84e1c47 | 2010-08-05 06:19:24 +0800 | [diff] [blame] | 581 | } |
| 582 | |
Holger Hans Peter Freyther | 9bdf5a9 | 2011-06-02 19:04:22 +0200 | [diff] [blame] | 583 | static int receive_from(struct mgcp_endpoint *endp, int fd, struct sockaddr_in *addr, |
| 584 | char *buf, int bufsize) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 585 | { |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 586 | int rc; |
| 587 | socklen_t slen = sizeof(*addr); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 588 | |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 589 | rc = recvfrom(fd, buf, bufsize, 0, |
| 590 | (struct sockaddr *) addr, &slen); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 591 | if (rc < 0) { |
Holger Hans Peter Freyther | 575b895 | 2010-04-07 12:55:40 +0200 | [diff] [blame] | 592 | LOGP(DMGCP, LOGL_ERROR, "Failed to receive message on: 0x%x errno: %d/%s\n", |
| 593 | ENDPOINT_NUMBER(endp), errno, strerror(errno)); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 594 | return -1; |
| 595 | } |
| 596 | |
| 597 | /* do not forward aynthing... maybe there is a packet from the bts */ |
Holger Hans Peter Freyther | 39a97e2 | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 598 | if (!endp->allocated) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 599 | return -1; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 600 | |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 601 | #warning "Slight spec violation. With connection mode recvonly we should attempt to forward." |
| 602 | |
| 603 | return rc; |
| 604 | } |
| 605 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 606 | static int rtp_data_net(struct osmo_fd *fd, unsigned int what) |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 607 | { |
| 608 | char buf[4096]; |
| 609 | struct sockaddr_in addr; |
| 610 | struct mgcp_endpoint *endp; |
| 611 | int rc, proto; |
| 612 | |
| 613 | endp = (struct mgcp_endpoint *) fd->data; |
| 614 | |
Holger Hans Peter Freyther | 9bdf5a9 | 2011-06-02 19:04:22 +0200 | [diff] [blame] | 615 | rc = receive_from(endp, fd->fd, &addr, buf, sizeof(buf)); |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 616 | if (rc <= 0) |
| 617 | return -1; |
| 618 | |
| 619 | if (memcmp(&addr.sin_addr, &endp->net_end.addr, sizeof(addr.sin_addr)) != 0) { |
| 620 | LOGP(DMGCP, LOGL_ERROR, |
Holger Hans Peter Freyther | eedb453 | 2012-11-12 10:55:29 +0100 | [diff] [blame] | 621 | "Endpoint 0x%x data from wrong address %s vs. ", |
| 622 | ENDPOINT_NUMBER(endp), inet_ntoa(addr.sin_addr)); |
| 623 | LOGPC(DMGCP, LOGL_ERROR, |
| 624 | "%s\n", inet_ntoa(endp->net_end.addr)); |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 625 | return -1; |
| 626 | } |
| 627 | |
| 628 | if (endp->net_end.rtp_port != addr.sin_port && |
| 629 | endp->net_end.rtcp_port != addr.sin_port) { |
| 630 | LOGP(DMGCP, LOGL_ERROR, |
| 631 | "Data from wrong source port %d on 0x%x\n", |
| 632 | ntohs(addr.sin_port), ENDPOINT_NUMBER(endp)); |
| 633 | return -1; |
| 634 | } |
| 635 | |
| 636 | /* throw away the dummy message */ |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 637 | if (rc == 1 && buf[0] == MGCP_DUMMY_LOAD) { |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 638 | LOGP(DMGCP, LOGL_NOTICE, "Filtered dummy from network on 0x%x\n", |
| 639 | ENDPOINT_NUMBER(endp)); |
| 640 | return 0; |
| 641 | } |
| 642 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 643 | proto = fd == &endp->net_end.rtp ? MGCP_PROTO_RTP : MGCP_PROTO_RTCP; |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 644 | endp->net_end.packets += 1; |
Holger Hans Peter Freyther | 952f752 | 2012-09-12 11:38:37 +0200 | [diff] [blame] | 645 | endp->net_end.octets += rc; |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 646 | |
| 647 | forward_data(fd->fd, &endp->taps[MGCP_TAP_NET_IN], buf, rc); |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 648 | |
| 649 | switch (endp->type) { |
| 650 | case MGCP_RTP_DEFAULT: |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 651 | return mgcp_send(endp, MGCP_DEST_BTS, proto == MGCP_PROTO_RTP, |
| 652 | &addr, buf, rc); |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 653 | case MGCP_RTP_TRANSCODED: |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 654 | return mgcp_send_transcoder(&endp->trans_net, endp->cfg, |
| 655 | proto == MGCP_PROTO_RTP, buf, rc); |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 656 | } |
| 657 | |
| 658 | LOGP(DMGCP, LOGL_ERROR, "Bad MGCP type %u on endpoint %u\n", |
| 659 | endp->type, ENDPOINT_NUMBER(endp)); |
| 660 | return 0; |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 661 | } |
| 662 | |
Holger Hans Peter Freyther | 52ccf6a | 2010-08-06 07:48:41 +0800 | [diff] [blame] | 663 | static void discover_bts(struct mgcp_endpoint *endp, int proto, struct sockaddr_in *addr) |
| 664 | { |
| 665 | struct mgcp_config *cfg = endp->cfg; |
| 666 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 667 | if (proto == MGCP_PROTO_RTP && endp->bts_end.rtp_port == 0) { |
Holger Hans Peter Freyther | 52ccf6a | 2010-08-06 07:48:41 +0800 | [diff] [blame] | 668 | if (!cfg->bts_ip || |
| 669 | memcmp(&addr->sin_addr, |
| 670 | &cfg->bts_in, sizeof(cfg->bts_in)) == 0 || |
| 671 | memcmp(&addr->sin_addr, |
| 672 | &endp->bts_end.addr, sizeof(endp->bts_end.addr)) == 0) { |
| 673 | |
| 674 | endp->bts_end.rtp_port = addr->sin_port; |
| 675 | endp->bts_end.addr = addr->sin_addr; |
| 676 | |
| 677 | LOGP(DMGCP, LOGL_NOTICE, |
| 678 | "Found BTS for endpoint: 0x%x on port: %d/%d of %s\n", |
| 679 | ENDPOINT_NUMBER(endp), ntohs(endp->bts_end.rtp_port), |
| 680 | ntohs(endp->bts_end.rtcp_port), inet_ntoa(addr->sin_addr)); |
| 681 | } |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 682 | } else if (proto == MGCP_PROTO_RTCP && endp->bts_end.rtcp_port == 0) { |
Holger Hans Peter Freyther | 52ccf6a | 2010-08-06 07:48:41 +0800 | [diff] [blame] | 683 | if (memcmp(&endp->bts_end.addr, &addr->sin_addr, |
| 684 | sizeof(endp->bts_end.addr)) == 0) { |
| 685 | endp->bts_end.rtcp_port = addr->sin_port; |
| 686 | } |
| 687 | } |
| 688 | } |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 689 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 690 | static int rtp_data_bts(struct osmo_fd *fd, unsigned int what) |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 691 | { |
| 692 | char buf[4096]; |
| 693 | struct sockaddr_in addr; |
| 694 | struct mgcp_endpoint *endp; |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 695 | int rc, proto; |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 696 | |
| 697 | endp = (struct mgcp_endpoint *) fd->data; |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 698 | |
Holger Hans Peter Freyther | 9bdf5a9 | 2011-06-02 19:04:22 +0200 | [diff] [blame] | 699 | rc = receive_from(endp, fd->fd, &addr, buf, sizeof(buf)); |
Holger Hans Peter Freyther | b615164 | 2010-08-05 06:27:22 +0800 | [diff] [blame] | 700 | if (rc <= 0) |
| 701 | return -1; |
| 702 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 703 | proto = fd == &endp->bts_end.rtp ? MGCP_PROTO_RTP : MGCP_PROTO_RTCP; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 704 | |
| 705 | /* We have no idea who called us, maybe it is the BTS. */ |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 706 | /* it was the BTS... */ |
Holger Hans Peter Freyther | 52ccf6a | 2010-08-06 07:48:41 +0800 | [diff] [blame] | 707 | discover_bts(endp, proto, &addr); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 708 | |
Holger Hans Peter Freyther | ea97fbf | 2010-08-05 10:53:26 +0000 | [diff] [blame] | 709 | if (memcmp(&endp->bts_end.addr, &addr.sin_addr, sizeof(addr.sin_addr)) != 0) { |
| 710 | LOGP(DMGCP, LOGL_ERROR, |
| 711 | "Data from wrong bts %s on 0x%x\n", |
| 712 | inet_ntoa(addr.sin_addr), ENDPOINT_NUMBER(endp)); |
| 713 | return -1; |
| 714 | } |
| 715 | |
| 716 | if (endp->bts_end.rtp_port != addr.sin_port && |
| 717 | endp->bts_end.rtcp_port != addr.sin_port) { |
| 718 | LOGP(DMGCP, LOGL_ERROR, |
| 719 | "Data from wrong bts source port %d on 0x%x\n", |
| 720 | ntohs(addr.sin_port), ENDPOINT_NUMBER(endp)); |
| 721 | return -1; |
| 722 | } |
| 723 | |
Holger Hans Peter Freyther | b3c206a | 2010-05-14 02:18:59 +0800 | [diff] [blame] | 724 | /* throw away the dummy message */ |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 725 | if (rc == 1 && buf[0] == MGCP_DUMMY_LOAD) { |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 726 | LOGP(DMGCP, LOGL_NOTICE, "Filtered dummy from bts on 0x%x\n", |
Holger Hans Peter Freyther | aa9d3ce | 2010-04-22 12:14:51 +0800 | [diff] [blame] | 727 | ENDPOINT_NUMBER(endp)); |
| 728 | return 0; |
| 729 | } |
| 730 | |
Holger Hans Peter Freyther | b4b135e | 2010-04-07 09:37:17 +0200 | [diff] [blame] | 731 | /* do this before the loop handling */ |
Holger Hans Peter Freyther | e602cd6 | 2010-08-05 06:55:58 +0800 | [diff] [blame] | 732 | endp->bts_end.packets += 1; |
Holger Hans Peter Freyther | 952f752 | 2012-09-12 11:38:37 +0200 | [diff] [blame] | 733 | endp->bts_end.octets += rc; |
Holger Hans Peter Freyther | b4b135e | 2010-04-07 09:37:17 +0200 | [diff] [blame] | 734 | |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 735 | forward_data(fd->fd, &endp->taps[MGCP_TAP_BTS_IN], buf, rc); |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 736 | |
| 737 | switch (endp->type) { |
| 738 | case MGCP_RTP_DEFAULT: |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 739 | return mgcp_send(endp, MGCP_DEST_NET, proto == MGCP_PROTO_RTP, |
| 740 | &addr, buf, rc); |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 741 | case MGCP_RTP_TRANSCODED: |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 742 | return mgcp_send_transcoder(&endp->trans_bts, endp->cfg, |
| 743 | proto == MGCP_PROTO_RTP, buf, rc); |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 744 | } |
| 745 | |
| 746 | LOGP(DMGCP, LOGL_ERROR, "Bad MGCP type %u on endpoint %u\n", |
| 747 | endp->type, ENDPOINT_NUMBER(endp)); |
| 748 | return 0; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 749 | } |
| 750 | |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 751 | static int rtp_data_transcoder(struct mgcp_rtp_end *end, struct mgcp_endpoint *_endp, |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 752 | int dest, struct osmo_fd *fd) |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 753 | { |
| 754 | char buf[4096]; |
| 755 | struct sockaddr_in addr; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 756 | struct mgcp_config *cfg; |
| 757 | int rc, proto; |
| 758 | |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 759 | cfg = _endp->cfg; |
Holger Hans Peter Freyther | 9bdf5a9 | 2011-06-02 19:04:22 +0200 | [diff] [blame] | 760 | rc = receive_from(_endp, fd->fd, &addr, buf, sizeof(buf)); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 761 | if (rc <= 0) |
| 762 | return -1; |
| 763 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 764 | proto = fd == &end->rtp ? MGCP_PROTO_RTP : MGCP_PROTO_RTCP; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 765 | |
| 766 | if (memcmp(&addr.sin_addr, &cfg->transcoder_in, sizeof(addr.sin_addr)) != 0) { |
| 767 | LOGP(DMGCP, LOGL_ERROR, |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 768 | "Data not coming from transcoder dest: %d %s on 0x%x\n", |
| 769 | dest, inet_ntoa(addr.sin_addr), ENDPOINT_NUMBER(_endp)); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 770 | return -1; |
| 771 | } |
| 772 | |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 773 | if (end->rtp_port != addr.sin_port && |
| 774 | end->rtcp_port != addr.sin_port) { |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 775 | LOGP(DMGCP, LOGL_ERROR, |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 776 | "Data from wrong transcoder dest %d source port %d on 0x%x\n", |
| 777 | dest, ntohs(addr.sin_port), ENDPOINT_NUMBER(_endp)); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 778 | return -1; |
| 779 | } |
| 780 | |
| 781 | /* throw away the dummy message */ |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 782 | if (rc == 1 && buf[0] == MGCP_DUMMY_LOAD) { |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 783 | LOGP(DMGCP, LOGL_NOTICE, "Filtered dummy from transcoder dest %d on 0x%x\n", |
| 784 | dest, ENDPOINT_NUMBER(_endp)); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 785 | return 0; |
| 786 | } |
| 787 | |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 788 | end->packets += 1; |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 789 | return mgcp_send(_endp, dest, proto == MGCP_PROTO_RTP, &addr, buf, rc); |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 790 | } |
| 791 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 792 | static int rtp_data_trans_net(struct osmo_fd *fd, unsigned int what) |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 793 | { |
| 794 | struct mgcp_endpoint *endp; |
| 795 | endp = (struct mgcp_endpoint *) fd->data; |
| 796 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 797 | return rtp_data_transcoder(&endp->trans_net, endp, MGCP_DEST_NET, fd); |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 798 | } |
| 799 | |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 800 | static int rtp_data_trans_bts(struct osmo_fd *fd, unsigned int what) |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 801 | { |
| 802 | struct mgcp_endpoint *endp; |
| 803 | endp = (struct mgcp_endpoint *) fd->data; |
| 804 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 805 | return rtp_data_transcoder(&endp->trans_bts, endp, MGCP_DEST_BTS, fd); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 806 | } |
| 807 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 808 | static int mgcp_create_bind(const char *source_addr, struct osmo_fd *fd, |
| 809 | int port) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 810 | { |
| 811 | struct sockaddr_in addr; |
| 812 | int on = 1; |
| 813 | |
| 814 | fd->fd = socket(AF_INET, SOCK_DGRAM, 0); |
| 815 | if (fd->fd < 0) { |
| 816 | LOGP(DMGCP, LOGL_ERROR, "Failed to create UDP port.\n"); |
| 817 | return -1; |
| 818 | } |
| 819 | |
| 820 | setsockopt(fd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| 821 | memset(&addr, 0, sizeof(addr)); |
| 822 | addr.sin_family = AF_INET; |
| 823 | addr.sin_port = htons(port); |
| 824 | inet_aton(source_addr, &addr.sin_addr); |
| 825 | |
| 826 | if (bind(fd->fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { |
Holger Hans Peter Freyther | 6f36e92 | 2010-08-06 03:00:17 +0800 | [diff] [blame] | 827 | close(fd->fd); |
| 828 | fd->fd = -1; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 829 | return -1; |
| 830 | } |
| 831 | |
| 832 | return 0; |
| 833 | } |
| 834 | |
Holger Hans Peter Freyther | 75492e6 | 2010-05-31 10:22:00 +0800 | [diff] [blame] | 835 | static int set_ip_tos(int fd, int tos) |
| 836 | { |
| 837 | int ret; |
| 838 | ret = setsockopt(fd, IPPROTO_IP, IP_TOS, |
| 839 | &tos, sizeof(tos)); |
| 840 | return ret != 0; |
| 841 | } |
| 842 | |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 843 | static int bind_rtp(struct mgcp_config *cfg, struct mgcp_rtp_end *rtp_end, int endpno) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 844 | { |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 845 | if (mgcp_create_bind(cfg->source_addr, &rtp_end->rtp, |
| 846 | rtp_end->local_port) != 0) { |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 847 | LOGP(DMGCP, LOGL_ERROR, "Failed to create RTP port: %s:%d on 0x%x\n", |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 848 | cfg->source_addr, rtp_end->local_port, endpno); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 849 | goto cleanup0; |
| 850 | } |
| 851 | |
Pablo Neira Ayuso | 66b52c1 | 2013-08-14 15:55:45 +0200 | [diff] [blame] | 852 | if (mgcp_create_bind(cfg->source_addr, &rtp_end->rtcp, |
| 853 | rtp_end->local_port + 1) != 0) { |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 854 | LOGP(DMGCP, LOGL_ERROR, "Failed to create RTCP port: %s:%d on 0x%x\n", |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 855 | cfg->source_addr, rtp_end->local_port + 1, endpno); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 856 | goto cleanup1; |
| 857 | } |
| 858 | |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 859 | set_ip_tos(rtp_end->rtp.fd, cfg->endp_dscp); |
| 860 | set_ip_tos(rtp_end->rtcp.fd, cfg->endp_dscp); |
Holger Hans Peter Freyther | 75492e6 | 2010-05-31 10:22:00 +0800 | [diff] [blame] | 861 | |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 862 | rtp_end->rtp.when = BSC_FD_READ; |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 863 | if (osmo_fd_register(&rtp_end->rtp) != 0) { |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 864 | LOGP(DMGCP, LOGL_ERROR, "Failed to register RTP port %d on 0x%x\n", |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 865 | rtp_end->local_port, endpno); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 866 | goto cleanup2; |
| 867 | } |
| 868 | |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 869 | rtp_end->rtcp.when = BSC_FD_READ; |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 870 | if (osmo_fd_register(&rtp_end->rtcp) != 0) { |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 871 | LOGP(DMGCP, LOGL_ERROR, "Failed to register RTCP port %d on 0x%x\n", |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 872 | rtp_end->local_port + 1, endpno); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 873 | goto cleanup3; |
| 874 | } |
| 875 | |
| 876 | return 0; |
| 877 | |
| 878 | cleanup3: |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 879 | osmo_fd_unregister(&rtp_end->rtp); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 880 | cleanup2: |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 881 | close(rtp_end->rtcp.fd); |
| 882 | rtp_end->rtcp.fd = -1; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 883 | cleanup1: |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 884 | close(rtp_end->rtp.fd); |
| 885 | rtp_end->rtp.fd = -1; |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 886 | cleanup0: |
| 887 | return -1; |
| 888 | } |
| 889 | |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 890 | static int int_bind(const char *port, |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 891 | struct mgcp_rtp_end *end, int (*cb)(struct osmo_fd *, unsigned), |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 892 | struct mgcp_endpoint *_endp, int rtp_port) |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 893 | { |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 894 | if (end->rtp.fd != -1 || end->rtcp.fd != -1) { |
| 895 | LOGP(DMGCP, LOGL_ERROR, "Previous %s was still bound on %d\n", |
| 896 | port, ENDPOINT_NUMBER(_endp)); |
| 897 | mgcp_free_rtp_port(end); |
Holger Hans Peter Freyther | 7fe2a3d | 2010-08-06 07:18:22 +0800 | [diff] [blame] | 898 | } |
| 899 | |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 900 | end->local_port = rtp_port; |
| 901 | end->rtp.cb = cb; |
| 902 | end->rtp.data = _endp; |
| 903 | end->rtcp.data = _endp; |
| 904 | end->rtcp.cb = cb; |
| 905 | return bind_rtp(_endp->cfg, end, ENDPOINT_NUMBER(_endp)); |
| 906 | } |
| 907 | |
| 908 | |
| 909 | int mgcp_bind_bts_rtp_port(struct mgcp_endpoint *endp, int rtp_port) |
| 910 | { |
| 911 | return int_bind("bts-port", &endp->bts_end, |
| 912 | rtp_data_bts, endp, rtp_port); |
Holger Hans Peter Freyther | 314584a | 2010-08-05 04:10:21 +0800 | [diff] [blame] | 913 | } |
| 914 | |
| 915 | int mgcp_bind_net_rtp_port(struct mgcp_endpoint *endp, int rtp_port) |
| 916 | { |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 917 | return int_bind("net-port", &endp->net_end, |
| 918 | rtp_data_net, endp, rtp_port); |
Holger Hans Peter Freyther | 1b0ea97 | 2010-02-21 11:11:04 +0100 | [diff] [blame] | 919 | } |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 920 | |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 921 | int mgcp_bind_trans_net_rtp_port(struct mgcp_endpoint *endp, int rtp_port) |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 922 | { |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 923 | return int_bind("trans-net", &endp->trans_net, |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 924 | rtp_data_trans_net, endp, rtp_port); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 925 | } |
| 926 | |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 927 | int mgcp_bind_trans_bts_rtp_port(struct mgcp_endpoint *endp, int rtp_port) |
| 928 | { |
Holger Hans Peter Freyther | 386a940 | 2010-11-01 21:15:22 +0100 | [diff] [blame] | 929 | return int_bind("trans-bts", &endp->trans_bts, |
Holger Hans Peter Freyther | 3f29cc8 | 2010-11-01 21:25:33 +0100 | [diff] [blame] | 930 | rtp_data_trans_bts, endp, rtp_port); |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 931 | } |
| 932 | |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 933 | int mgcp_free_rtp_port(struct mgcp_rtp_end *end) |
| 934 | { |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 935 | if (end->rtp.fd != -1) { |
| 936 | close(end->rtp.fd); |
| 937 | end->rtp.fd = -1; |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 938 | osmo_fd_unregister(&end->rtp); |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 939 | } |
| 940 | |
| 941 | if (end->rtcp.fd != -1) { |
| 942 | close(end->rtcp.fd); |
| 943 | end->rtcp.fd = -1; |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 944 | osmo_fd_unregister(&end->rtcp); |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 945 | } |
| 946 | |
| 947 | return 0; |
| 948 | } |
Holger Hans Peter Freyther | 38e02c5 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 949 | |
| 950 | |
| 951 | void mgcp_state_calc_loss(struct mgcp_rtp_state *state, |
| 952 | struct mgcp_rtp_end *end, uint32_t *expected, |
| 953 | int *loss) |
| 954 | { |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 955 | *expected = state->cycles + state->out_stream.last_seq; |
Holger Hans Peter Freyther | 38e02c5 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 956 | *expected = *expected - state->base_seq + 1; |
| 957 | |
| 958 | if (!state->initialized) { |
| 959 | *expected = 0; |
| 960 | *loss = 0; |
| 961 | return; |
| 962 | } |
| 963 | |
| 964 | /* |
| 965 | * Make sure the sign is correct and use the biggest |
| 966 | * positive/negative number that fits. |
| 967 | */ |
| 968 | *loss = *expected - end->packets; |
| 969 | if (*expected < end->packets) { |
| 970 | if (*loss > 0) |
| 971 | *loss = INT_MIN; |
| 972 | } else { |
| 973 | if (*loss < 0) |
| 974 | *loss = INT_MAX; |
| 975 | } |
| 976 | } |
Holger Hans Peter Freyther | cb306a6 | 2012-10-24 21:22:47 +0200 | [diff] [blame] | 977 | |
| 978 | uint32_t mgcp_state_calc_jitter(struct mgcp_rtp_state *state) |
| 979 | { |
| 980 | if (!state->initialized) |
| 981 | return 0; |
| 982 | return state->jitter >> 4; |
| 983 | } |